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Sally Kohn is an activist, columnist and television commentator. Follow her on Twitter: @sallykohn. The opinions expressed in this commentary are hers.

(CNN)Donald Trump and his campaign are uncomfortable with the truth. Mr. Trump has made that clear throughout his campaign, and on Wednesday his chief counsel, Michael Cohen, punctuated the point in a tense interview with CNN's Brianna Keilar.

"You guys are down," Keilar said.

"Says who?" Cohen asked.

"Polls ... most of them," Keilar continued. Maybe even "all of them?"

There was an unusually long silence — long enough, perhaps, for anyone listening to hear Trump's poll numbers dropping further, in real time, on live television.

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"Says who?" Cohen asked again.

"Polls," said Keilar. "I just told you."

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Cohen: What polls show Donald Trump is losing?

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Cohen: What polls show Donald Trump is losing?01:45

Okay, forget for a second that Donald Trump's chief legal counsel and one of the most trusted, senior leaders in the Trump organization just comported himself on national television like a kindergartener in a playground scuffle (a video of the exchange buzzed across social media to much mockery).

I've been guilty of a few childish faces and remarks, too — though, of course, I only represent myself and not someone running to be the leader of the free world. Important distinction.

But what Cohen revealed was a deeper truth about his candidate's relationship to facts and reality. It's tenuous and voters should take note.

Says who?

According to Politifact, during this campaign Trump has misspoken, bent the truth or downright lied at least 78% of the time. In other words, more than three out of four of the "factual" assertions that Trump makes are plainly the opposite.

Photos:Trump campaign: 11 outrageous quotes

Donald Trump has gone from outsider to controversial front-runner in the race to become the Republican Party's 2016 presidential candidate. Trump began his bid with an announcement speech on June 16, calling for a massive wall on the U.S. border with Mexico -- for which he said he would make Mexico pay. At this stage he was tied for 10th place in the polls, at just 3%.

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Photos:Trump campaign: 11 outrageous quotes

On week five of the campaign, Trump turned on Sen. John McCain at the Family Leadership Summit in Ames, Iowa. McCain is regarded by many as a war hero after being captured and held in Vietnam for more than five years. After the comments, Republicans rushed to condemn Trump, with rival candidate Sen. Lindsey Graham calling him "a jackass."

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Photos:Trump campaign: 11 outrageous quotes

During the Republican presidential debate on August 6, Megyn Kelly pressed Trump about misogynistic, sexist comments he made in the past, such as calling some women "fat pigs, dogs, slobs and disgusting animals."

Trump slammed Kelly for this, calling her questions "ridiculous" and "off-base."After the first GOP presidential debate, Trump said: "You could see there was blood coming out of her eyes ... blood coming out of her... wherever." Many accused him of making a lewd comment about menstruation.

Trump told CNN's State of the Union that only a "deviant" or "sick" person would think otherwise. On ABC's This Week, Trump said: "I have nothing against Megyn Kelly, but she asked me a very, very nasty question."

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Photos:Trump campaign: 11 outrageous quotes

In an effort to defend himself from critics of his remarks about the Fox anchor, Trump explained why it is hard for others to insult him -- his own good looks. Trump spoke about the backlash on NBC, saying: "There's nothing to apologize (for). I thought she asked a very, very unfair question."

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Photos:Trump campaign: 11 outrageous quotes

Trump was quoted in Rolling Stone magazine on September 9, mocking Republican rival Carly Fiorina's appearance. On the same day, Trump told crowds: "We are led by very, very stupid people."

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Photos:Trump campaign: 11 outrageous quotes

On October 5, Donald Trump said there would be a "collapse" and "depression" in television ratings if he ended his presidential campaign. Later Trump suggested he would skip a CNN debate unless the network gave him $5 million. CNN refused, and Trump later backtracked.

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Photos:Trump campaign: 11 outrageous quotes

On November 22, Trump repeated his claim -- widely regarded as false -- that he saw television reports of Muslims in New Jersey celebrating the 9/11 terrorist attacks. No footage to back up Trump's assertions has been found.

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Photos:Trump campaign: 11 outrageous quotes

In the wake of December's San Bernardino, California, shootings, Trump called for a travel ban on all Muslims from entering the United States "until our country's representatives can figure out what is going on." He did not give details on how Muslims would be identified, but the Republican candidate did not rule out special identification cards.

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Photos:Trump campaign: 11 outrageous quotes

Donald Trump has developed an unlikely bromance with Russian President Vladimir Putin during the campaign. Trump had previously praised Putin as a leader he would "get along very well with." Then, on December 17, Putin further stoked the flame, describing Trump as "a bright and talented person." This led Trump in turn to make more positive comments about the Russian leader.

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Photos:Trump campaign: 11 outrageous quotes

An unrelenting Trump took the run-up to Christmas as a chance to insult Democrat hopeful Hillary Clinton. He said Clinton's bathroom break in a TV debate was "disgusting" before saying she "got schlonged" by Barack Obama in the 2008 presidential race. "Schlong" is a Yiddish word for penis.

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Photos:Trump campaign: 11 outrageous quotes

On January 24, Donald Trump boasted at a campaign rally in Sioux Center, Iowa, that support for his presidential campaign would not decline even if he shot someone in the middle of a crowded street.

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Similarly, as of July of this summer, the Washington Post's Fact Checker column had rated 65% of Trump's statements as "Four Pinocchios" or "whoppers" — meaning, not just false, but flagrantly so. For comparison, the Post's Glenn Kessler wrote, "Most politicians tend to earn Four Pinocchios 10 to 20 percent of the time."

In other words, for a guy who has built his campaign in large part on insisting that voters can't trust normal politicians, Donald Trump has proven himself to be repeatedly untrustworthy — and, in fact, more so than others.

Is Trump just an arrogant, megalomaniacal con artist willing to say whatever he thinks will deceive the American people and help him win the election? Yes, there's that.

But what do polls matter, really? Or a letter signed by dozens of Republican national security officials and another one by 120 elected officials from every GOP administration since President Ronald Reagan, both opposing Trump?

Apparently none of this matters. Facts and the opinions of others, Trump seems to think, are worthless.

Says who?

"I'm speaking with myself, number one," Trump tells us. "Because I have a very good brain and I've said a lot of things."